3-Methyl-2-cyclopentenone
- CAS No.
- 2758-18-1
- Chemical Name:
- 3-Methyl-2-cyclopentenone
- Synonyms
- 2-Cyclopenten-1-one, 3-methyl-;3-METHYL-2-CYCLOPENTEN-1-ONE;3-methylcyclopent-2-enone;3-methylcyclopent-2-en-1-one;Methylcyclopentenone;3-METHYL-2-CYCLOPENTENE-1-ONE;3-MCP;1-Methyl-1-cyclopenten-3-one;3-Methylcyclopent-2-enon;3-METHYL-2-CYCLOPENTENONE
- CBNumber:
- CB9246368
- Molecular Formula:
- C6H8O
- Molecular Weight:
- 96.13
- MDL Number:
- MFCD00001403
- MOL File:
- 2758-18-1.mol
- MSDS File:
- SDS
- TDS File:
- TDS
| Product description | Number | Pack Size | Price |
| 3-Methyl-2-cyclopenten-1-one 97%, FG | W343502 | 1 each | $63.5 |
| 3-Methyl-2-cyclopentenone 97% | 145777 | 5g | $170 |
| 3-Methyl-2-cyclopentenone 97% | 145777 | 25g | $776 |
| 3-Methyl-2-cyclopenten-1-one 97%, FG | W343502 | 1 unit | $58.61 |
| 3-Methyl-2-cyclopenten-1-one 97%, FG | W343502 | 1 unit | $58.61 |
| More product size | |||
| Melting point | 3-5 °C (lit.) |
|---|---|
| Boiling point | 74 °C/15 mmHg (lit.) |
| Density | 0.980 g/mL at 20 °C 0.971 g/mL at 25 °C (lit.) |
| refractive index |
n |
| FEMA | 3435 | 1-METHYL-1-CYCLOPENTEN-3-ONE |
| FLAVIS Number | 07.112 | 3-Methyl-2-cyclopenten-1-one |
| Flash point | 150 °F |
| storage temp. | 2-8°C |
| solubility | Soluble in DMSO |
| form | Liquid |
| color | Clear light yellow to yellow-brown |
| PH | 4.9 (10g/l, H2O, 20℃) |
| Odor | at 1.00 % in dipropylene glycol. sweet fruity fatty |
| Odor Type | fruity |
| biological source | synthetic |
| Water Solubility | miscible |
| JECFA Number | 1105 |
| BRN | 1280476 |
| Major Application | flavors and fragrances |
| InChI | 1S/C6H8O/c1-5-2-3-6(7)4-5/h4H,2-3H2,1H3 |
| InChIKey | CHCCBPDEADMNCI-UHFFFAOYSA-N |
| SMILES | CC1=CC(=O)CC1 |
| LogP | 0.54 |
| CAS DataBase Reference | 2758-18-1(CAS DataBase Reference) |
| Substances Added to Food (formerly EAFUS) | 1-METHYL-1-CYCLOPENTEN-3-ONE |
| FDA UNII | 6V7RSW7273 |
| NIST Chemistry Reference | 2-Cyclopenten-1-one, 3-methyl-(2758-18-1) |
| EPA Substance Registry System | 3-Methyl-2-cyclopenten-1-one (2758-18-1) |
| UNSPSC Code | 12352100 |
| NACRES | NA.22 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H227 | |||||||||
| Precautionary statements | P210e-P280a-P370+P378a-P403+P235-P501a | |||||||||
| PPE | Eyeshields, Gloves, multi-purpose combination respirator cartridge (US) | |||||||||
| Risk Statements | 36/38 | |||||||||
| Safety Statements | 24/25 | |||||||||
| RIDADR | 1224 | |||||||||
| WGK Germany | 3 | |||||||||
| TSCA | TSCA listed | |||||||||
| HazardClass | CBL | |||||||||
| PackingGroup | III | |||||||||
| HS Code | 29142900 | |||||||||
| Storage Class | 10 - Combustible liquids | |||||||||
| REACH Registrations | Active | |||||||||
| Excepted Quantities | Non-Hazardous | |||||||||
| NFPA 704 |
|
3-Methyl-2-cyclopentenone price More Price(52)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | W343502 | 3-Methyl-2-cyclopenten-1-one 97%, FG | 2758-18-1 | 1 each | $63.5 | 2026-04-30 | Buy |
| Sigma-Aldrich | 145777 | 3-Methyl-2-cyclopentenone 97% | 2758-18-1 | 5g | $170 | 2026-04-30 | Buy |
| Sigma-Aldrich | 145777 | 3-Methyl-2-cyclopentenone 97% | 2758-18-1 | 25g | $776 | 2026-04-30 | Buy |
| Sigma-Aldrich | W343502 | 3-Methyl-2-cyclopenten-1-one 97%, FG | 2758-18-1 | 1 unit | $58.61 | 2025-07-31 | Buy |
| Sigma-Aldrich | W343502 | 3-Methyl-2-cyclopenten-1-one 97%, FG | 2758-18-1 | 1 unit | $58.61 | 2025-07-31 | Buy |
3-Methyl-2-cyclopentenone Chemical Properties,Uses,Production
Description
May be prepared by dehydrohalogenation of 2-chloro-l-methylcyclopentan-3-one.
Chemical Properties
1-Methyl-1-cyclopenten-3-one has a sweet-floral, warm-spicy and diffusive yet quite tenacious odor.
Chemical Properties
clear light yellow to yellow-brownish liquid
Occurrence
Reported found in roasted onion, cooked pork, black tea, soybean and dried bonito
Uses
3-Methyl-2-cyclopentenone was used in the synthesis of 2-hydroxy-3-methyl-2-cyclopentenone.
Uses
It is an important raw material and intermediate used in Organic Synthesis, Pharmaceuticals, Agrochemicals.
Application
3-Methyl-2-cyclopentenone is used as an important intermediate in the production of various natural products and petrol additives[1].
Definition
ChEBI: 3-Methyl-2-cyclopenten-1-one is a cyclic ketone.
Preparation
By dehydrohalogenation of 2-chloro-1-methyl-cyclopentan-3-one.
Synthesis Reference(s)
Journal of the American Chemical Society, 101, p. 494, 1979 DOI: 10.1021/ja00496a044
The Journal of Organic Chemistry, 55, p. 371, 1990
General Description
3-Methyl-2-cyclopenten-1-one is a component of smoke flavoring.
Synthesis
3-Methyl-2-cyclopentenone (MCP) can be selectively synthesised via 2,5-hexanedione (HD) using a heterogeneous catalyst as a support. In a heterogeneous catalytic system, Bell et al. found that a Mg-Al-Ox catalyst, prepared by calcining MgAl hydrotalcite at 700 °C, achieved both a yield and selectivity of 98% when converting HD to MCP in a formaldehyde/water two-phase medium. In addition, the use of simple alumina-based solid acid catalysts, such as γ-Al₂O₃ and AlOOH, can achieve a selectivity of over 71% in the conversion of HD to MCP[1].
References
[1] Shun Nishimura, Kohki E., Shintaro Ohmatsu. (2019). Selective synthesis of 3-methyl-2-cyclopentenone via intramolecular aldol condensation of 2,5-hexanedione with γ-Al2O3/AlOOH nanocomposite catalyst. Fuel Processing Technology, 196, Article 106185. https://doi.org/10.1016/j.fuproc.2019.106185
3-Methyl-2-cyclopentenone Preparation Products And Raw materials
Raw materials
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Preparation Products
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| GuiZhou DoSincerely biological technology Co.,Ltd. | +8613511983931 | 271622643@qq.com | China | 9 | 58 |
| Dayang Chem (Hangzhou) Co.,Ltd. | +86-0571-88938639 +8617705817739 | info@dycnchem.com | China | 52705 | 58 |
| Hebei Yanxi Chemical Co., Ltd. | +8618531123677 | faithe@yan-xi.com | China | 5853 | 58 |
| Hebei Chuanghai Biotechnology Co,.LTD | +86-86-13131129325 +8613131129325 | sales1@chuanghaibio.com | China | 5231 | 58 |
| Henan Fengda Chemical Co., Ltd | +86-371-86557731 +86-13613820652 | info@fdachem.com | China | 20122 | 58 |
| JINING XINHE CHEMICAL CO., LTD | +8615318402391 | sales@xinhepharma.com | China | 809 | 58 |
| Capot Chemical Co.,Ltd. | +8613336195806 | sales@capot.com | China | 29640 | 60 |
| Shanghai Daken Advanced Materials Co.,Ltd | +86-2158073036 | info@dakenam.com | China | 13901 | 58 |
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | info@tianfuchem.com | China | 21588 | 55 |
| career henan chemical co | +86-0371-86658258 +8613203830695 | sales@coreychem.com | China | 29815 | 58 |
View Lastest Price from 3-Methyl-2-cyclopentenone manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-05-29 | 3-Methyl-2-cyclopenten-1-one
2758-18-1
|
0.99 | RongNa Biotechnology Co.,Ltd | ||||
 |
2026-05-28 | 3-Methyl-2-cyclopenten-1-one
2758-18-1
|
US $100.00-50.00 / KG | 1KG | 99% | 10000kg | Hebei Chuanghai Biotechnology Co,.LTD | |
 |
2026-05-21 | 3-Methyl-2-cyclopenten-1-one
2758-18-1
|
US $5.00 / KG | 1KG | 99% | 200mt/year | Jinan Finer Chemical Co., Ltd |
-
- 3-Methyl-2-cyclopenten-1-one
2758-18-1
- 0.99
- RongNa Biotechnology Co.,Ltd
-
- 3-Methyl-2-cyclopenten-1-one
2758-18-1
- US $100.00-50.00 / KG
- 99%
- Hebei Chuanghai Biotechnology Co,.LTD
-
- 3-Methyl-2-cyclopenten-1-one
2758-18-1
- US $5.00 / KG
- 99%
- Jinan Finer Chemical Co., Ltd
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